Researchers develop method to make sound waves travel in one direction only
A new method makes sound waves travel single way for better signal routing.
Scientists at ETH Zurich, with collaboration from EPFL, have innovated a method to make sound waves travel in a single direction using a circulator device. Their approach was spearheaded by Professor Nicolas Noiray, who applied knowledge from preventing dangerous oscillations in aircraft engines to direct sound propagation.
The circulator utilizes self-sustaining aero-acoustic oscillations and consists of a disk-shaped cavity with air blown through. This setup generates a spinning wave allowing unidirectional sound movement, enhancing energy as waves travel forward without loss.
Experiments with 800 Hertz sound confirmed strengthening of waves when directed through selected waveguides. The technology promises advances in radar systems, electromagnetic metamaterials, and signal routing innovations for improved communication networks.